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The Yucca, Yearbook of North Texas State University, 1962
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Indexes start on page 478.
Date:
1962
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1971
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Indexes start on page 486.
Date:
1971
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1963
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 500.
Date:
1963
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
[Students Working on Yucca]
Photograph of two women working on the Yucca yearbook at North Texas State University.
Date:
February 1961
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
The Yucca, Yearbook of North Texas State University, 1973
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Volume A: Features, Fine Arts, Sports; index starts on page 112. Volume B: Beauties, Honor Professors, Who's Who, Greeks, Orgainzations; index starts on page 174. Volume C: Administration, Photo Essay, Academics, Classes; index starts on page 120.
Date:
1973
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1966
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 481.
Date:
1966
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State Normal School, 1921
Yearbook for North Texas State Normal College in Denton, Texas includes photos of and information about the school, student body, professors, and organizations.
Date:
1921
Creator:
North Texas State Normal College
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1964
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Indexes start on page 494.
Date:
1964
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1969
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 482.
Date:
1969
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State College, 1961
Yearbook for North Texas State College in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Indexes start on page 512.
Date:
1961
Creator:
North Texas State College
Object Type:
Yearbook
System:
The Portal to Texas History
The Yucca, Yearbook of North Texas State University, 1965
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 497.
Date:
1965
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
Predicting the Future at Yucca Mountain
This paper summarizes a climate-prediction model funded by the DOE for the Yucca Mountain nuclear waste repository. Several articles in the open literature attest to the effects of the Global Ocean Conveyor upon paleoclimate, specifically entrance and exit from the ice age. The data shows that these millennial-scale effects are duplicated on the microscale of years to decades. This work also identifies how man may have influenced the Conveyor, affecting global cooling and warming for 2,000 years.
Date:
July 1, 1999
Creator:
Wilson, J. R.
Object Type:
Article
System:
The UNT Digital Library
YUCCA MOUNTAIN SITE DESCRIPTION
The ''Yucca Mountain Site Description'' summarizes, in a single document, the current state of knowledge and understanding of the natural system at Yucca Mountain. It describes the geology; geochemistry; past, present, and projected future climate; regional hydrologic system; and flow and transport within the unsaturated and saturated zones at the site. In addition, it discusses factors affecting radionuclide transport, the effect of thermal loading on the natural system, and tectonic hazards. The ''Yucca Mountain Site Description'' is broad in nature. It summarizes investigations carried out as part of the Yucca Mountain Project since 1988, but it also includes work done at the site in earlier years, as well as studies performed by others. The document has been prepared under the Office of Civilian Radioactive Waste Management quality assurance program for the Yucca Mountain Project. Yucca Mountain is located in Nye County in southern Nevada. The site lies in the north-central part of the Basin and Range physiographic province, within the northernmost subprovince commonly referred to as the Great Basin. The basin and range physiography reflects the extensional tectonic regime that has affected the region during the middle and late Cenozoic Era. Yucca Mountain was initially selected for characterization, in part, …
Date:
April 16, 2004
Creator:
Simmons, A. M.
Object Type:
Report
System:
The UNT Digital Library
Batch sorption results for neptunium transport through Yucca Mountain tuffs. Yucca Mountain Site Characterization Program milestone 3349
We studied the sorption of neptunium onto tuffs characteristic of the proposed nuclear waste repository at Yucca Mountain, Nevada. The neptunium was in the Np(V) oxidation state under oxidizing conditions in groundwaters from two wells located close to the repository site (J-13 and UE-25 p No.1). We used devitrified, vitric, zeolitic (with emphasis on clinoptilolite-rich samples), and calcite-rich tuffs characteristic of the geology of the site. Neptunium sorbed well onto calcite and calcite-rich tuffs, indicating that a significant amount of neptunium retardation can be expected under fractured-flow scenarios because of calcite coating of the fractures. Neptunium sorption onto clinoptilolite-rich zeolitic tuffs in J-13 well water (pH from 7 to 8.5) was moderate, increased with decreasing pH, and correlated to surface area and amount of clinoptilolite. Neptunium sorbed poorly onto zeolitic tuffs from UE-25 p No.1 groundwater (pH from 7 to 9) and onto devitrified and vitric tuffs from J-13 and UE-25 p No.1 waters (pH from 7 to 9). Iron oxides appeared to be passivated in tuffs, not seeming to contribute to the observed neptunium sorption, even though neptunium sorption onto synthetic iron oxide is significant.
Date:
September 1, 1996
Creator:
Triay, I. R.; Cotter, C. R.; Huddleston, M. H. & Leonard, D. E.
Object Type:
Report
System:
The UNT Digital Library
DOE`s Yucca Mountain studies
This booklet is about the disposal of high-level nuclear waste in the United States. It is for readers who have a general rather than a technical background. It discusses why scientists and engineers think high-level nuclear waste may be disposed of safely underground. It also describes why Yucca Mountain, Nevada, is being studied as a potential repository site and provides basic information about those studies.
Date:
December 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Yucca, Yearbook of North Texas State University, 1972
Yearbook for North Texas State University in Denton, Texas includes photos of and information about the school, student body, professors, and organizations. Index starts on page 422.
Date:
1972
Creator:
North Texas State University
Object Type:
Yearbook
System:
The Portal to Texas History
[Photograph 2012.201.B0267.0356]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "DESERT PLANTINGS such as yucca and cacti give a southwestern appeal to many Parade of Homes entries."
Date:
May 23, 1962
Creator:
Lucas, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Characterize Eruptive Processes at Yucca Mountain, Nevada
This Analysis/Model Report (AMR), ''Characterize Eruptive Processes at Yucca Mountain, Nevada'', presents information about natural volcanic systems and the parameters that can be used to model their behavior. This information is used to develop parameter-value distributions appropriate for analysis of the consequences of volcanic eruptions through a potential repository at Yucca Mountain. Many aspects of this work are aimed at resolution of the Igneous Activity Key Technical Issue (KTI) as identified by the Nuclear Regulatory Commission (NRC 1998, p. 3), Subissues 1 and 2, which address the probability and consequence of igneous activity at the proposed repository site, respectively. Within the framework of the Disruptive Events Process Model Report (PMR), this AMR provides information for the calculations in two other AMRs ; parameters described herein are directly used in calculations in these reports and will be used in Total System Performance Assessment (TSPA). Compilation of this AMR was conducted as defined in the Development Plan, except as noted. The report begins with considerations of the geometry of volcanic feeder systems, which are of primary importance in predicting how much of a potential repository would be affected by an eruption. This discussion is followed by one of the physical and chemical …
Date:
December 20, 2001
Creator:
Valentine, G.
Object Type:
Report
System:
The UNT Digital Library
Revised mineralogic summary of Yucca Mountain, Nevada
We have evaluated three-dimensional mineral distribution at Yucca Mountain, Nevada, using quantitative x-ray powder diffraction analysis. All data were obtained on core cuttings, or sidewall samples obtained from drill holes at and around Yucca Mountain. Previously published data are included with corrections, together with new data for several drill holes. The new data presented in this report used the internal standard method of quantitative analysis, which yields results of high precision for the phases commonly found in Yucca Mountain tuffs including opal-CT and glass. Mineralogical trends with depth previously noted are clearly shown by these new data. Glass occurrence is restricted almost without exception to above the present-day static water level (SWL), although glass has been identified below the SWL in partially zeolitized tuffs. Silica phases undergo well-defined transitions with depth, with tridymite and cristobalite occurring only above the SWL, opal-CT occurring with clinoptilolite-mordenite tuffs, and quartz most abundant below the SWL. Smectite occurs in small amounts in most samples but is enriched in two distinct zones. These zones are at the top of the vitric nonwelded base of the Tiva Canyon Member and at the top of the basal vitrophyre of the Topopah Spring Member. Our data support the …
Date:
March 1, 1989
Creator:
Bish, D. L. & Chipera, S. J.
Object Type:
Report
System:
The UNT Digital Library
Characterize Eruptive Processes at Yucca Mountain, Nevada
The purpose of this scientific analysis report, ''Characterize Eruptive Processes at Yucca Mountain, Nevada'', is to present information about natural volcanic systems and the parameters that can be used to model their behavior. This information is used to develop parameter-value distributions appropriate for analysis of the consequences of volcanic eruptions through a repository at Yucca Mountain. This scientific analysis report provides information to four other reports: ''Number of Waste Packages Hit by Igneous Intrusion'', (BSC 2004 [DIRS 170001]); ''Atmospheric Dispersal and Deposition of Tephra from Potential Volcanic Eruption at Yucca Mountain, Nevada'' (BSC 2004 [DIRS 170026]); ''Dike/Drift Interactions'' (BSC 2004 [DIRS 170028]); ''Development of Earthquake Ground Motion Input for Preclosure Seismic Design and Postclosure Performance Assessment of a Geologic Repository at Yucca Mountain, NV'' (BSC 2004 [DIRS 170027], Section 6.5). This report is organized into seven major sections. This section addresses the purpose of this document. Section 2 addresses quality assurance, Section 3 the use of software, Section 4 identifies the requirements that constrain this work, and Section 5 lists assumptions and their rationale. Section 6 presents the details of the scientific analysis and Section 7 summarizes the conclusions reached.
Date:
October 4, 2004
Creator:
Krier, D.
Object Type:
Report
System:
The UNT Digital Library
Summary report on the geochemistry of Yucca Mountain and environs
This report gives a detailed description of work at Los Alamos that will help resolve geochemical issues pertinent to siting a high-level nuclear waste repository in tuff at Yucca Mountain, Nevada. It is necessary to understand the properties and setting of the host tuff because this rock provides the first natural barrier to migration of waste elements from a repository. The geochemistry of tuff is being investigated with particular emphasis on retardation processes. This report addresses the various aspects of sorption by tuff, physical and chemical makeup of tuff, diffusion processes, tuff/groundwater chemistry, waste element chemistry under expected repository conditions, transport processes involved in porous and fracture flow, and geochemical and transport modeling.
Date:
December 1, 1982
Creator:
Daniels, W.R.; Wolfsberg, K. & Rundberg, R.S.
Object Type:
Report
System:
The UNT Digital Library
Radionuclide sorption in Yucca Mountain tuffs with J-13 well water: Neptunium, uranium, and plutonium. Yucca Mountain site characterization program milestone 3338
We studied the retardation of actinides (neptunium, uranium, and plutonium) by sorption as a function of radionuclide concentration in water from Well J-13 and of tuffs from Yucca Mountain. Three major tuff types were examined: devitrified, vitric, and zeolitic. To identify the sorbing minerals in the tuffs, we conducted batch sorption experiments with pure mineral separates. These experiments were performed with water from Well J-13 (a sodium bicarbonate groundwater) under oxidizing conditions in the pH range from 7 to 8.5. The results indicate that all actinides studied sorb strongly to synthetic hematite and also that Np(V) and U(VI) do not sorb appreciably to devitrified or vitric tuffs, albite, or quartz. The sorption of neptunium onto clinoptilolite-rich tuffs and pure clinoptilolite can be fitted with a sorption distribution coefficient in the concentration range from 1 X 10{sup -7} to 3 X 10{sup -5} M. The sorption of uranium onto clinoptilolite-rich tuffs and pure clinoptilolite is not linear in the concentration range from 8 X 10{sup -8} to 1 X 10{sup -4} M, and it can be fitted with nonlinear isotherm models (such as the Langmuir or the Freundlich Isotherms). The sorption of neptunium and uranium onto clinoptilolite in J-13 well water …
Date:
August 1, 1996
Creator:
Triay, I.R.; Cotter, C.R.; Kraus, S.M. & Huddleston, M.H.
Object Type:
Report
System:
The UNT Digital Library
The use of chlorine isotope measurements to trace water movements at Yucca Mountain
The rates of water movements in the tuffs at Yucca Mountain are important for assessing the performance of a potential high-level nuclear waste repository. Measurements of cosmogenic 3.0 {times} 10{sup 5} yr {sup 36}Cl in tuff from the unsaturated zone and in water from the saturated zone can provide information about water movements over times of 10{sup 15} to 10{sup 6} years. The data derived from the analysis of cuttings from a dry-drilled hole at Yucca Mountain indicate the presence of a {sup 36}Cl background that must be taken into account for proper interpretation of the {sup 36}Cl interpretation of the {sup 36}Cl results. Similarly, the {sup 36}Cl measured in water from the saturated zone requires additional work for correct interpretation. Fallout of {sup 36}Cl from nuclear weapons tests between 1952 and 1962 provided a tracer for an infiltration study. Measurements of the {sup 36}Cl bomb pulse in tuffs from the unsaturated zone show potential for tracing recent water flow in faults and fractures. 5 refs.
Date:
August 1989
Creator:
Norris, A. E.
Object Type:
Article
System:
The UNT Digital Library
Summary and Synthesis Report on Radionuclide Retardation for the Yucca Mountain Site Characterization Project - Yucca Mountain Site Characterization Program Milestone 3784M
None
Date:
October 1, 1998
Creator:
Meijer, Arend; Strietelmeier, Betty A.; Tait, C. Drew; Hobart, David E.; Clark, David L.; Triay, Inez R. et al.
Object Type:
Report
System:
The UNT Digital Library